WO2010113856A1 - 吸収性物品に係る複合シートの製造方法、及び製造装置 - Google Patents
吸収性物品に係る複合シートの製造方法、及び製造装置 Download PDFInfo
- Publication number
- WO2010113856A1 WO2010113856A1 PCT/JP2010/055541 JP2010055541W WO2010113856A1 WO 2010113856 A1 WO2010113856 A1 WO 2010113856A1 JP 2010055541 W JP2010055541 W JP 2010055541W WO 2010113856 A1 WO2010113856 A1 WO 2010113856A1
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- WIPO (PCT)
- Prior art keywords
- support shaft
- side roller
- swing arm
- composite sheet
- shaft portion
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
- A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
- A61F13/15609—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons the ribbons being applied in an irregular path
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
- B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
- A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/57—Diaper manufacture
Definitions
- the present invention relates to a method for manufacturing a composite sheet and an apparatus for manufacturing an absorbent article.
- a disposable diaper etc. are known as an example of an absorptive article which absorbs excretion fluid.
- the continuous member of the elastic member is continuously attached in a meandering pattern such as a sine curve to the continuous member of the sheet continuously conveyed in the conveying direction.
- Patent Document 1 discloses a rotation center axis C201 around a predetermined support shaft portion 201 as shown in a side view of FIG. 1A and a BB arrow view in FIG. 1A shown in FIG. 1B. It is disclosed that a continuous body of elastic members 211 is attached to a seat 213 using a swing arm 203 that swings and swings. That is, a through hole is provided in the swing end 203a of the swing arm 203, and a continuous body of the elastic member 211 is passed through the through hole.
- the swing end 203a is swung in the CD direction intersecting with the transport direction of the sheet 213, and thereby the sheet 213 transported in the transport direction.
- a continuous body of elastic members 211 is attached in a predetermined meandering pattern.
- Patent Document 1 also describes a drive mechanism of the swing arm 203, that is, the drive rotation shaft of the motor 205 is directly connected to the support shaft portion 201 of the swing arm 203 concentrically. It is shown.
- the continuous body of the elastic member 211 is directly sent to the through hole of the swing end 203 a of the swing arm 203 from the guide roller 207 supported by a part other than the swing arm 203. For this reason, when the swing amplitude of the swing arm 203 is large, the running state of the continuous member of the elastic member 211 may become unstable, for example, the continuous member of the elastic member 211 is easily detached from the guide roller 207. There is.
- said suitable supply route R211 can be set.
- the suitable supply route 211 may be inevitably set below the support shaft portion 201.
- the present invention has been made in view of the above-described conventional problems, and is a continuous elastic member that moves toward the support shaft portion along the rotation center axis direction of the support shaft portion of the swing arm. It is easy to set the body supply route, thereby improving the running stability of the continuous body of the elastic member.
- the main invention for achieving the above object is: A method of manufacturing a composite sheet according to an absorbent article by joining a continuum of elastic members in a predetermined meandering pattern to a continuum of sheets continuously conveyed in the conveyance direction, Winding the continuous body of the sheet around the outer peripheral surface of a transport roll rotating in a direction along the transport direction, and transporting the continuous body of the sheet;
- the continuum of the elastic member is sent to the continuum of the sheet wound around the transport roll through a swinging arm that swings in a crossing direction intersecting the transport direction with the support shaft as a pivot point. Bonding, and
- the swing arm has a swing end side roller provided on the swing end side of the swing arm, and a support shaft side roller provided on the support shaft side.
- the continuum of the elastic members supplied toward the support shaft side roller in the supply route along the rotation center axis direction of the support shaft portion is sequentially transferred to the support shaft side roller. Hung around the outer peripheral surface and the outer peripheral surface of the rocking end side roller and guided to the continuous body of the sheet, In the manufacturing method of the composite sheet according to the absorbent article, a driving force for swinging the swing arm is input to a position different from the support shaft portion of the swing arm.
- An apparatus for manufacturing a composite sheet according to an absorbent article by joining a continuum of elastic members in a predetermined meandering pattern to a continuum of sheets continuously conveyed in the conveyance direction,
- a transport roll that rotates in a direction along the transport direction and winds and conveys a continuous body of the sheet around an outer peripheral surface;
- a swing arm that swings in a crossing direction intersecting the transport direction with a support shaft as a pivot point, and sends and joins the continuous member of the elastic member to the continuous part of the sheet wound around the transport roll;
- the swing arm has a swing end side roller provided on the swing end side of the swing arm, and a support shaft side roller provided on the support shaft side.
- the present invention it is easy to set the supply route of the continuous member of the elastic member so as to go toward the support shaft portion along the rotation center axis direction of the support shaft portion of the swing arm.
- the running stability of the continuous member can be improved.
- FIG. 1A is a side view of a conventional method for attaching a continuous body of elastic members 211 in a predetermined meander pattern to a continuous body of sheets 213, and FIG. 1B is a view taken along the line BB in FIG. 1A.
- . 2A is a side view of the method of the reference example, and FIG. 2B is a view taken along the line BB in FIG. 2A.
- 3A is a partially broken plan view of the diaper 1, and FIG. 3B is an exploded perspective view thereof. It is a top view of the diaper 1 arrange
- FIG. 1A is a side view of a conventional method for attaching a continuous body of elastic members 211 in a predetermined meander pattern to a continuous body of sheets 213, and FIG. 1B is a view taken along the line BB in FIG. 1A.
- . 2A is a side view of the method of
- FIG. 5A is a side view showing the manufacturing apparatus 30 according to the present embodiment with a part broken away
- FIG. 5B is a view taken along the line BB in FIG. 5A. It is explanatory drawing of the other example of the position of the power point PP of a rocking
- a method of manufacturing a composite sheet according to an absorbent article by joining a continuum of elastic members in a predetermined meandering pattern to a continuum of sheets continuously conveyed in the conveyance direction, Winding the continuous body of the sheet around the outer peripheral surface of a transport roll rotating in a direction along the transport direction, and transporting the continuous body of the sheet;
- the continuum of the elastic member is sent to the continuum of the sheet wound around the transport roll through a swinging arm that swings in a crossing direction intersecting the transport direction with the support shaft as a pivot point. Bonding, and
- the swing arm has a swing end side roller provided on the swing end side of the swing arm, and a support shaft side roller provided on the support shaft side.
- the continuum of the elastic members supplied toward the support shaft side roller in the supply route along the rotation center axis direction of the support shaft portion is sequentially transferred to the support shaft side roller. Hung around the outer peripheral surface and the outer peripheral surface of the rocking end side roller and guided to the continuous body of the sheet, A manufacturing method of a composite sheet according to an absorbent article, wherein a driving force for swinging the swing arm is input to a position different from the support shaft portion of the swing arm.
- the swing arm can be swung without directly connecting the drive rotation shaft of the swing arm drive source to the support shaft portion. . Therefore, it is not necessary to dispose a drive source in the vicinity of the support shaft portion, and as a result, it becomes easy to supply the continuous member of the elastic member toward the support shaft portion through a supply route along the rotation center axis direction of the support shaft portion.
- a support shaft side roller is provided on the support shaft side portion of the swing arm, and the continuous member of the elastic member is located on the support shaft side along the rotation center axis direction of the support shaft portion. Sent to a roller. Therefore, the movement in the crossing direction of the continuum of the elastic member that can be caused by the swinging motion of the swing arm mainly appears as a twist of the portion of the continuum of the elastic member that is located upstream of the support shaft side roller. As a result, the continuous member of the elastic member is effectively prevented from falling off from the support shaft side roller. As a result, the running state of the continuous member of the elastic member can be stabilized.
- a method for producing a composite sheet according to such an absorbent article The rocking end side roller and the support shaft side roller are provided on the surface of the rocking arm on the side facing the transport roll,
- the support shaft portion is formed with a communication space for communicating the side facing the transport roll and the side not facing the transport roll along the rotation center axis direction of the support shaft portion,
- the continuum of the elastic member sent by the supply route along the rotation center axis direction of the support shaft portion reaches the surface of the swing arm that does not face the transport roll, and is passed through the communication space. It is desirable to reach the support shaft side roller.
- the swing arm is directed to a surface on the opposite side of the surface on which the support shaft side roller is provided (that is, the surface not facing the transport roll).
- the elastic member continuum can be reliably wound around the support shaft portion side roller through the communication space of the support shaft portion.
- the communication space is preferably a through-hole formed in the support shaft portion along the direction of the rotation center axis of the support shaft portion.
- the swing arm is directed to a surface on the opposite side of the surface on which the support shaft side roller is provided (that is, the surface not facing the transport roll).
- a method for producing a composite sheet according to such an absorbent article It is desirable that the rotation center axis of the support shaft portion is in contact with the outer peripheral surface of the support shaft side roller. According to the method of manufacturing a composite sheet relating to such an absorbent article, the rotation center shaft of the support shaft portion is in contact with the outer peripheral surface of the support shaft portion side roller. Therefore, the continuous body of elastic members is reliably sent to the support shaft side roller along the rotation center axis direction of the support shaft portion. As a result, the movement of the continuum of elastic members that may occur due to the swinging motion of the swinging arm appears as a twist of the elastic member upstream of the support shaft side roller and is absorbed by this. As a result, it is possible to effectively prevent the continuous member of the elastic member from coming off the support shaft side roller.
- a method for producing a composite sheet according to such an absorbent article In order to input the driving force to the swing arm, a drive source having a drive rotary shaft that rotates and converts the rotational operation of the drive rotary shaft into a reciprocating motion and transmits it to the position of the swing arm.
- Conversion transmission mechanism includes a rotating member that is integrally attached to the drive rotating shaft, and a connecting member that connects the position of the swing arm to a position eccentric from the driving rotating shaft in the rotating member. , It is desirable that a plurality of the eccentric positions are set on the rotating member with different amounts of eccentricity.
- the amplitude amount of the swing arm can be changed by selecting the eccentric position of the rotating member. Therefore, by selecting the eccentric position according to the meandering pattern of the elastic member, it can be easily changed to a desired meandering pattern.
- a method for producing a composite sheet according to such an absorbent article The transport roll rotates around a rotation axis; The oscillating end side roller of the oscillating arm and the support shaft portion are arranged so as to sandwich the rotating shaft of the transport roll between them, The continuous member of the elastic member is preferably supplied to the transport roll after the traveling direction is reversed by the oscillating end side roller. According to such a method for manufacturing a composite sheet relating to an absorbent article, a large winding angle of the continuous member of the elastic member around the rocking end side roller can be secured.
- the elastic member continuum can be firmly held on the outer peripheral surface of the oscillating end side roller, and as a result, the elastic member continuous body can be effectively prevented from falling off the oscillating end side roller.
- the running state of the continuous member can be stabilized.
- the continuous member of the elastic member is a continuous member of the belt member
- the continuous member of the belt member can be sent to the sheet while maintaining a substantially flat shape. It is possible to join the continuum by bringing the continuum into surface contact. That is, due to the reversal of the traveling direction described above, the continuous belt member is wound around the outer peripheral surface of the swing end side roller at a large winding angle. Therefore, the continuous member of the belt member is constrained to a substantially flat shape by the outer peripheral surface, and as a result, the surface is surely brought into surface contact and joined to the sheet.
- a method for producing a composite sheet according to such an absorbent article The support shaft side roller is supported by the swing arm so that the orientation of the support shaft side roller with respect to the swing arm cannot be changed with the outer peripheral surface of the support shaft side roller facing the swing end of the swing arm. It is desirable that According to the method for manufacturing a composite sheet relating to such an absorbent article, the outer peripheral surface of the support shaft side roller faces the swing end side roller in accordance with the swinging motion of the swing end side roller. Therefore, even if the position of the oscillating end side roller is changed in the intersecting direction by the oscillating operation, the continuous member of the elastic member can be reliably sent toward the oscillating end side roller. It is possible to stabilize the running state of the elastic member continuum, such as effectively preventing the elastic member continuity from falling off the end roller. In addition, the outer peripheral surface of the support shaft side roller can always face the swing end in synchronization with the swing operation of the swing arm.
- a method for producing a composite sheet according to such an absorbent article The crossing direction is perpendicular to the transport direction;
- the rotation center axis direction of the support shaft portion is perpendicular to a rotation axis for rotating the conveyance roll in a direction along the conveyance direction,
- the oscillating end side roller is arranged so that the rotation axis of the oscillating end side roller is perpendicular to the rotation center axis direction of the support shaft portion, It is desirable that the support shaft side roller is arranged so that the rotation shaft of the support shaft portion side roller is perpendicular to the rotation center axis direction of the support shaft portion.
- the directions of the rotation shafts of the transport roll, the oscillating end side roller, and the support shaft portion side roller are respectively the rotation center axes of the support shaft portions. It is perpendicular to the direction. Therefore, it is possible to suppress twisting of the elastic member continuum when the elastic member continuum is transferred from the rocking end side roller to the conveyance roll, and to ensure that the elastic member continuum is in surface contact with the sheet continuum. Can do.
- An apparatus for manufacturing a composite sheet according to an absorbent article by joining a continuum of elastic members in a predetermined meandering pattern to a continuum of sheets continuously conveyed in the conveyance direction,
- a transport roll that rotates in a direction along the transport direction and winds and conveys a continuous body of the sheet around an outer peripheral surface;
- a swing arm that swings in a crossing direction intersecting the transport direction with a support shaft as a pivot point, and sends and joins the continuous member of the elastic member to the continuous part of the sheet wound around the transport roll;
- the swing arm has a swing end side roller provided on the swing end side of the swing arm, and a support shaft side roller provided on the support shaft side.
- the composite sheet manufacturing apparatus according to the absorbent article wherein a driving force for swinging the swing arm is input to a position different from the support shaft portion of the swing arm.
- the swing arm can be swung without directly connecting the drive rotation shaft of the swing arm drive source to the support shaft portion.
- a support shaft side roller is provided on the support shaft side portion of the swing arm, and the continuous member of the elastic member is located on the support shaft side along the rotation center axis direction of the support shaft portion. Sent to a roller. Therefore, the movement in the crossing direction of the continuum of the elastic member that can be caused by the swinging motion of the swing arm mainly appears as a twist of the portion of the continuum of the elastic member that is located upstream of the support shaft side roller. As a result, the continuous member of the elastic member is effectively prevented from falling off from the support shaft side roller. As a result, the running state of the continuous member of the elastic member can be stabilized.
- 3A is a partially broken plan view of the diaper 1
- FIG. 3B is an exploded perspective view thereof.
- the front waistline region 1a and the back waistline region 1c are shown separated in the flank of the pant-type diaper 1.
- the diaper 1 has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, and a front waistline region 1a, a crotch region 1b, and a back waistline region 1c are set along the longitudinal direction of the diaper 1.
- the diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-absorbing absorber 4 interposed between the two sheets 2 and 3 in the thickness direction. Have. And the surface sheet 2 and the back surface sheet 3 overlap in the part extended outward from the periphery of the absorber 4, and are mutually joined by hot-melt-adhesive etc., Thereby, it is an edge part before and after a longitudinal direction.
- a flap 11 is formed, and side edge flaps 12 are formed on the left and right in the width direction.
- a leg-recessed recess 10 is formed to be curved inward in the width direction, and the diaper 1 has a substantially hourglass shape as a whole.
- a liquid permeable plastic film or a non-woven fabric is used for the surface sheet 2.
- the back sheet 3 has an inner sheet 3a facing the top sheet 2 and an outer sheet 3b facing the inner sheet 3a.
- the two sheets 3a and 3b have the same shape and size as each other, and are joined by adhesion or welding. Has been.
- a liquid-impermeable plastic film or a nonwoven fabric is used for the inner sheet 3a, and a breathable nonwoven fabric is used for the outer sheet 3b.
- the waist elastic members 16 are joined to the front and back sheets 2 and 3 in an extended state on the respective end edge flaps 11 of the front and rear waist areas 1a and 1c.
- a front elastic band member 21 and a rear elastic band member 22 are provided across the diaper 1 along the width direction in the crotch region 1b and the vicinity thereof.
- these elastic band members 21 and 22 for example, a stretchable nonwoven fabric, a band-shaped rubber, or the like is used.
- Each of the elastic band members 21 and 22 extends in the width direction with a predetermined meandering pattern curved in a convex shape toward a center line CL that bisects the diaper 1 in the longitudinal direction.
- the inner sheet 3a and the outer sheet 3b constituting the back sheet 3 are interposed between the inner sheet 3a and the outer sheet 3b.
- the front and rear elastic band members 21 and 22 cooperate to impart stretchability around the leg-recessed recess 10.
- a sine curve is illustrated as the meandering pattern of the elastic band members 21 and 22.
- the meandering pattern is such that the notch portion 10 around the leg effectively fits around the leg of the diaper wearer. It can change suitably so that it may obtain.
- the elastic band members 21 and 22 are arranged so as to intersect each other at the folded portion of each meander pattern. Further, in order to weaken the stretchability of the intersecting region R, the elastic band members 21 and 22 belonging to the intersecting region R may be divided. Incidentally, the reason why the stretchability of the intersecting region R is weakened is that when the stretchability reaches the portion of the absorbent body 4, the absorbent body 4 is wrinkled and the liquid absorption performance may be deteriorated.
- the manufacturing method and manufacturing apparatus 30 of the composite sheet which concerns on this embodiment >>> Such a diaper 1 is completed by joining various components to the base material of the diaper 1 that continuously flows through the production line.
- the manufacturing method and the manufacturing apparatus 30 of the composite sheet according to the present embodiment are responsible for one step. That is, here, the elastic band member 121 to be the above-described front elastic band member 21 with respect to a continuous body of the sheet 103b to be the outer sheet 3b of the above-described back sheet 3 (hereinafter referred to as the sheet 103b).
- a continuum (corresponding to a continuum of elastic members, hereinafter referred to as an elastic band member 121) and a continuum of elastic band members 122 to be the rear elastic band member 22 (corresponding to a continuum of elastic members).
- the elastic band member 122 is referred to as a meandering pattern.
- FIG. 5A is a side view showing a part of the manufacturing apparatus 30 according to the process
- FIG. 5B is a view taken along the line BB in FIG. 5A.
- the width direction of the manufacturing apparatus 30 is also referred to as the CD direction or the front side-back side.
- the direction orthogonal to the CD direction is referred to as the MD direction. That is, the MD direction means an arbitrary direction in a plane orthogonal to the CD direction.
- two directions orthogonal to each other are defined as a vertical direction (vertical direction) and a horizontal direction (horizontal direction).
- the CD direction also faces the horizontal direction, and is also orthogonal to the left-right direction, which also faces the horizontal direction.
- the manufacturing apparatus 30 includes (1) a transport roll 50 that transports the sheet 103b in the MD direction (corresponding to the transport direction) by rotating the sheet 103b while winding the sheet 103b at a predetermined winding angle, and (2) a left of the transport roll 50.
- Slit device 40 that generates a pair of elastic band members 121 and 122 by dividing the sheet-like member 120, which is disposed on the left side and is sent continuously from the left side, into two parts at the center in the CD direction
- (3) a first guide member 60 that continuously sends and joins the elastic band member 121 in an extended state to a portion of the sheet 103b wound around the outer peripheral surface of the transport roll 50, and (4) the sheet 103b.
- a second guide member 160 that continuously feeds and extends the elastic band member 122 in an extended state to the portion.
- these 1st and 2nd guide members 60 and 160 respectively send the said elastic band members 121 and 122 to CD direction (crossing direction), sending the elastic band members 121 and 122 in charge toward the sheet
- a pair of elastic band members 121 and 122 are attached to the sheet surface in a surface contact state in an intended meandering pattern such as a sine curve.
- the hot melt adhesive is applied to the elastic band members 121 and 122 by an adhesive application device (not shown) before the elastic band members 121 and 122 are joined to the sheet 103b.
- each component 40, 50, 60, 160 will be described.
- each component device related to the manufacturing apparatus 30 is not attached to a vertical support wall 92 (so-called end plate) extending over the entire length of the manufacturing apparatus 30 in the MD direction. It is cantilevered via an appropriate bracket as shown. That is, as shown in FIG. 5B, a support wall 92 is erected along the direction substantially parallel to the MD direction (the direction substantially parallel to the paper surface) on the back side in the CD direction (the back side of the paper surface in FIG. 5A). is doing. The vertical wall surface of the support wall 92 supports the back side portion of each component device in the CD direction, and the front side portion is in an unsupported state.
- the transport roll 50 has a cylindrical body with the rotation axis C50 facing the horizontal CD direction as a main body, and rotates counterclockwise at a predetermined peripheral speed with the direction along the MD direction as the rotation direction.
- the sheet 103b is supplied to the conveying roll 50 substantially horizontally from the right side, and the sheet 103b has a winding start position Ps at a position of about 0 o'clock on the upper part of the conveying roll 50, for example, from 180 ° to It is wound around the outer peripheral surface of the transport roll 50 at a winding angle of 200 °, and the transport direction is reversed.
- the transport roll 50 may be configured as a drive roll that is driven and rotated by using an appropriate motor or the like as a drive source, or may be configured as a driven roll that is driven and rotated by the sheet 103b.
- the slit device 40 has a pair of upper and lower disk-shaped rotary blades 40a and 40b at the center in the CD direction. And when passing through these rotary blades 40a, 40b, the sheet-like member 120, which is the raw material of the elastic band members 121, 122, is divided into two parts, thereby generating a pair of elastic band members 121, 122. The elastic band members 121 and 122 are sent to the first guide member 60 and the second guide member 160, respectively.
- the first guide member 60 has a plate-like swing arm 61 provided on the left side of the transport roll 50.
- the swing arm 61 is disposed across the rotation axis C50 of the transport roll 50 in the vertical direction.
- the swing end 61a positioned above the rotation axis C50 can be swung in the CD direction with the support shaft portion 65 positioned below the rotation axis C50 as a turning fulcrum.
- the swinging drive mechanism 70 is a combination of a motor 72 and a crank mechanism 74, which will be described later.
- the support shaft portion 65 is, for example, a shaft body 65 that protrudes integrally and leftward from the left surface of the swing arm 61 and is rotatably supported in the outer cylinder member 66 via a bearing 67. ing.
- the outer cylinder member 66 is fixed to the support wall 92 via an appropriate bracket (not shown), whereby the swing arm 61 is supported so as to be rotatable around the rotation center axis C65 of the support shaft portion 65. ing.
- a pair of rollers 63 and 64 are rotatably supported around substantially horizontal rotation axes C63 and C64, respectively, on the right side surface, which is the surface facing the transport roll 50 in the swing arm 61.
- One roller 63 is a swing end side roller 63 provided at the swing end 61 a
- the other roller 64 is a support provided at a position closer to the support shaft portion 65 than the swing end side roller 63. This is the shaft side roller 64.
- the elastic band member 121 of the elastic band members 121 and 122 sent from the slitter device 40 is first sent to the right along the horizontal direction from the left, and then horizontally in the support shaft portion 65. It goes out to the right side surface of the swinging arm 61 through a through-hole 65h formed through in the direction (this through-hole 65h will be described later). And it is guided to the upper rocking
- the direction of travel is reversed substantially downward by the winding, and then supplied from the upper left of the transport roll 50 to the winding range Ps to Pe of the sheet 103b.
- the oscillating end side roller 63 reciprocates in the CD direction along with the oscillating operation of the oscillating end 61a, so that the elastic band member 121 is joined to the sheet surface of the sheet 103b.
- the elastic band member 121 is constrained to a substantially flat shape by the winding of the outer peripheral surface of the support shaft side roller 64 and the outer peripheral surface of the swing end side roller 63, so that the elastic band member 121 is the sheet 103 b.
- a surface contact state corresponding to “joining”.
- the swing end side roller 63 and the support shaft portion side roller 64 are respectively arranged on a straight line L1 connecting the swing end 61a and the rotation center axis C65 of the support shaft portion 65. ing.
- the oscillating end side roller 63 is fixed to the oscillating arm 61 so that its direction with respect to the oscillating arm 61 cannot be changed in a state where the outer peripheral surface thereof faces the rotation center axis C65 of the support shaft portion 65.
- the support shaft side roller 64 is also fixed to the swing arm 61 so that the direction of the support shaft side roller 64 with respect to the swing arm 61 cannot be changed with the outer peripheral surface facing the swing end 61a of the swing arm 61.
- the outer peripheral surface of the support shaft portion side roller 64 always faces the swing end side roller 63, so that it is elastic.
- the belt member 121 can be reliably sent toward the swing end side roller 63.
- the rotation axis C63 of the swing end side roller 63 and the rotation axis C64 of the support shaft side roller 64 are always maintained in a parallel state regardless of the swing operation of the swing arm 61. The Therefore, it is possible to reliably reduce the tension difference between the both end edges in the width direction of the elastic band member 121 that may be caused by the swinging operation of the swinging arm 61. As a result, the swinging end side roller 63 or the support shaft side It is possible to effectively prevent the elastic band member 121 from falling off the roller 64.
- the supply route R121 of the elastic band member 121 to the support shaft side roller 64 is aligned with the rotation center axis C65 of the support shaft portion 65.
- the roller 64 is arranged so that the outer peripheral surface of the support shaft portion side roller 64 is in contact with the rotation center axis C65 of the support shaft portion 65. Therefore, the movement in the CD direction of the elastic band member 121 that may be caused by the swinging operation of the swing arm 61 mainly appears as a twist of the portion 121a of the elastic band member 121 upstream of the support shaft side roller 64. As a result, the elastic band member 121 is effectively prevented from falling off the roller 64.
- the roller 64 since the roller 64 is arranged so that the outer peripheral surface of the support shaft portion side roller 64 is in contact with the rotation center axis C65 of the support shaft portion 65, the swing arm 61 swings.
- the amount of movement of the roller 64 in the CD direction that can be accompanied can be made substantially zero, and this also effectively prevents the elastic band member 121 from falling off the roller 64.
- the drive mechanism 70 of the swing arm 61 does not use a so-called direct drive, that is, a structure in which the drive rotation shaft 72a of a drive source such as a motor is directly connected to the support shaft portion 65.
- the driving force of the driving source is transmitted to the swing arm 61 via 74. This is due to two reasons.
- the first reason is to secure the above-described suitable supply route R121 for supplying the elastic band member 121. More specifically, as shown in FIG. 5A, the elastic band member 121 is supplied from the left side of the swing arm 61 due to the arrangement position of the slit device 40. However, the support shaft 65 is located on the left side of the swing arm 61. Therefore, when the drive rotation shaft 72a of the motor 72 is abutted and directly coupled to the support shaft portion 65, the motor 72 becomes an obstacle, and the above-described suitable supply route R121 of the elastic band member 121, that is, the support is described. It becomes difficult to set the supply route R121 that is aligned with the rotation center axis C65 of the shaft portion 65.
- such a through-hole 65h can also be expressed as a communication space for communicating the side facing the transport roll 50 (right side) and the side not facing the transport roll 50 (left side).
- the through-hole 61h is also formed in the left-right direction on the swing arm 61 in correspondence with the through-hole 65h.
- the second reason is to improve the operational stability of the swing arm 61 swinging.
- the crank mechanism 74 when the swing arm 61 performs a swing operation, the drive rotation shaft 72a of the motor 72 may be rotated in one direction, that is, the drive rotation shaft 72a of the motor 72. There is no need to rotate forward and reverse. As a result, the stability of the swing operation of the swing arm 61 is excellent because at least the switching control of the rotation direction of the motor 72 is not involved.
- Such a crank mechanism 74 (corresponding to a conversion transmission mechanism) is a disc-shaped disk member 75 (rotating member) that is integrally and concentrically fixed to the drive rotating shaft 72a of the motor 72 that faces the horizontal direction in the MD direction. And a rod-shaped link member 76 (corresponding to a connecting member) that connects the disk member 75 and the force point PP of the swing arm 61.
- the end of the link member 76 is connected to the disk member 75 at a position eccentric from the drive rotation shaft 72a by a connecting pin 78 or the like. Therefore, every time the disk member 75 makes one rotation, the link member 76 is reciprocated once in the longitudinal direction, and the swing arm 61 swings once by this reciprocation.
- a plurality of positions P75, P75,... are prepared as connection positions of the link member 76 in the disk member 75, and the plurality of positions P75, P75,.
- the amount of eccentricity, which is the distance to, should be different. If it becomes like this, the amplitude amount of the rocking
- connection positions P75, P75,... May be set at different positions with respect to the circumferential direction of the disk member 75.
- the rotational radii that are the eccentric amounts of the connection positions P75, P75,... are gradually reduced, and the connection positions P75, P75,. Appears as if it exists on one spiral. If the circumferential positions of the connection positions P75, P75,... Are different from each other in this way, it is assumed that the difference between the eccentric amount of one connection position P75 and the eccentric amount of the other connection position P75 is small. Even if it exists, the interference of connection position P75 and P75 can be avoided effectively.
- connection pin 78 when the connecting pin 78 is used for the connection between the disk member 75 and the link member 76, it is necessary to provide pin holes on the disk member 75 side, but it is possible to avoid these pin holes being connected. . Therefore, the amount of eccentricity of these connection positions P75 can be varied in small increments, and as a result, the amplitude of the swing arm 61 can be changed in small increments.
- connection positions P75, P75... Has a spiral shape as described above, the operator can set the magnitude of the amplitude associated with each connection position P75 to the disk member 75. Since it can recognize instantly based on the arrangement order of the connection positions P75 in the circumferential direction, it is possible to reduce the frequency of occurrence of selection errors in the connection positions P75 when changing the size.
- the force point PP of the swing arm 61 is a position opposite to the swing end 61a of the swing arm 61 while sandwiching the rotation center axis C65 of the support shaft portion 65 as shown in FIG. 5B.
- the swing arm 61 has an extension portion 61b extending from the support shaft portion 65 toward the opposite side of the swing end 61a, and a force point PP is set at an end portion of the extension portion 61b.
- the end of the link member 76 is connected to the force point PP by a connecting pin 78 or the like.
- the position of the force point PP is not limited to this as long as it is other than the support shaft portion 65. For example, as shown in FIG.
- the position between the support shaft portion 65 and the swing end 61a of the swing arm 61 is not limited thereto. It may be set to the part. Note that which of the configuration of FIG. 5B and the configuration of FIG. 6 is selected is determined based on the layout of the motor 72, the crank mechanism 74, and the like.
- the second guide member 160 is a member having substantially the same structure as the first guide member 60 described above. Then, as shown in FIG. 5B, the elastic band member 122 that is disposed on the back side of the first guide member 60 with respect to the CD direction is assigned to the first guide member 60. Are attached side by side on the far side in the CD direction with respect to the elastic band member 121 attached to the sheet 103b. However, depending on the disposable diaper 1, there may be an arrangement pattern in which the elastic band member 121 and the elastic band member 122 are partially crossed as shown in FIG. And in that case, if the 1st guide member 60 and the 2nd guide member 160 are arranged in parallel, these guide members 60 and 160 will collide, and the above-mentioned pattern cannot be formed.
- the position of the second guide member 160 in the circumferential direction Dc of the transport roll 50 is different from that of the first guide member 60, that is, the first The two guide members 161 are shifted from the first guide member 61 on the upstream side in the circumferential direction Dc.
- the swing arm 161 of the second guide member 160 moves the swing arm 61 of the first guide member 60 around a virtual axis (not shown) parallel to the rotation axis C50 of the transport roll 50.
- the rotation angle ⁇ is 90 °.
- the rotation angle ⁇ is 90 °.
- the swing arm 161 is disposed above the first guide member 60 and the transport roll 50 and across the rotation axis C50 of the transport roll 50 in the horizontal direction.
- the pivot end 161a positioned to the right of the rotation axis C50 is configured to be swingable in the CD direction with the support shaft portion 165 positioned to the left of the rotation axis C50 as a turning fulcrum.
- the drive mechanism 170 for swinging motion is a combination of a motor 172 and a crank mechanism 174.
- the support shaft portion 165 is a shaft body 165 that extends integrally and upward from the upper surface of the swing arm 161, and this shaft body 165 is interposed via a bearing 167.
- the outer cylinder member 166 is rotatably supported. The outer cylinder member 166 is fixed to the support wall 92.
- a pair of rollers 163 and 164 are rotatably supported around the horizontal rotation axes C163 and C164 on the lower surface of the swing arm 161 on the side facing the transport roll 50, respectively.
- One roller 163 is a rocking end side roller 163 provided at the rocking end 161 a
- the other roller 164 is a support provided at a position closer to the support shaft 165 than the rocking end side roller 163. This is the shaft side roller 164.
- the elastic band member 122 sent from the slitter device 40 is sent from the left side to the right side in the horizontal direction while being arranged next to the CD direction of the elastic band member 121 sent to the first guide member 60 described above.
- the direction change roller 190 changes the traveling direction upward in the vertical direction and reaches the support shaft portion side roller 164. , It is wound around the outer peripheral surface of the support shaft side roller 164.
- the sheet is supplied to the vicinity of the winding start position Ps of the sheet 103b from the upper right of the conveying roll 50.
- the oscillating end side roller 163 reciprocates in the CD direction along with the oscillating operation of the oscillating end 161a, so that the elastic band member 122 is joined to the sheet surface of the sheet 103b. Are joined in the meandering pattern to the sheet surface of the sheet 103b while being continuously changed in the CD direction. Further, at the time of the supply, the elastic band member 122 is constrained to a substantially flat shape by the winding of the outer peripheral surface of the support shaft side roller 164 and the outer peripheral surface of the swing end side roller 163, so that the surface contact with the sheet 103 b is performed. Joined in state.
- the configurations shown in the following (a) to (c) are the same as those of the first guide member 60, and thus detailed description thereof is omitted.
- the swing end side roller 163 and the support shaft portion side roller 164 are respectively disposed on a straight line connecting the swing end 161a of the swing arm 161 and the rotation center axis C165 of the support shaft portion 165.
- the swinging end roller 163 has its outer peripheral surface facing the rotation center axis C165 of the support shaft portion 165 of the swinging arm 161, and the swinging arm 161 cannot change its orientation with respect to the swinging arm 161.
- the support shaft side roller 164 is also fixed to the swing arm 161 in such a manner that the direction with respect to the swing arm 161 cannot be changed with the outer peripheral surface of the roller 164 facing the swing end 161a of the swing arm 161.
- the supply route R122 of the elastic band member 122 to the support shaft side roller 164 is aligned with the rotation center axis C165 of the support shaft portion 165 and the outer peripheral surface of the support shaft portion side roller 164 is supported.
- the support shaft portion side roller 164 is disposed so as to be in contact with the rotation center axis C165 of the shaft portion 165.
- the crank mechanism 74 (174) is exemplified as a conversion transmission mechanism that converts the rotation operation of the drive rotation shaft 72a of the motor 72 into a reciprocating movement operation and transmits the reciprocating movement operation to the swing arm 61 (161).
- the force point PP is set at the end of the extending portion 61b of the swing arm 61, the force point PP is not limited to this as long as the force point PP is set at a position different from the support shaft portion 65 (165).
- the drive rotation shaft 72a of the motor 72 is arranged in parallel with the support shaft portion 65, and the pulleys 81 and 82 are fixed to both the support portion 65 and the drive rotation shaft 72a, respectively.
- the endless belt 79 is wound around these pulleys 81 and 82, and the driving force required for the swinging operation of the swinging arm 61 is transmitted from the drive rotating shaft 72 a to the support portion 65 via the endless belt 79. You may do it. In this case, it goes without saying that the drive rotating shaft 72a is controlled to repeat forward and reverse rotation.
- a cylinder in which a piston appears and disappears by an appropriate working fluid such as hydraulic oil or air may be used.
- the piston is connected to the swing arm 61 (161), while the cylinder is attached to the support wall 92 via a swingable mounting structure such as a trunnion type or a clevis type. It is done.
- the method for producing a composite sheet according to the present invention has been applied to the production of the pant-type diaper 1.
- the present invention is not limited to this. You may apply to manufacture of the type
- the configuration in which the swing arm 61 (161) is provided with the two rollers, the swing end side roller 63 (163) and the support shaft side roller 64 (164), is not limited to this.
- One or more rollers may be provided between the swing end side roller 63 (163) and the support shaft side roller 64 (164).
- the rotation axis of the additionally installed roller is preferably parallel to the rotation axis C64 (C164) of the support shaft side roller 64 (164).
- the rotation center axis C65 of the support shaft portion 65 of the first guide member 60 is turned in the left-right direction (horizontal direction), and the support shaft portion 165 of the second guide member 160 is rotated.
- the central axis C165 is directed in the up-down direction (vertical direction) and the rotation axis C50 of the transport roll 50 is directed in the CD direction (horizontal direction)
- the support shaft portion 65 of the first guide member 60 or the second guide member 160 ( The rotation center axis C65 (C165) of 165) and the rotation axis C50 of the transport roll 50 are not limited to this as long as they are perpendicular to each other.
- the rotation axis C63 (C163) of the swing end side roller 63 (163) and the rotation axis C64 (C164) of the support shaft side roller 64 (164) are directed substantially in the horizontal direction.
- the elastic band member 121 (122) is handed over in a substantially flat shape with little twist to the transport roll 50 in which the rotation axis C50 faces the horizontal direction that is the CD direction. Therefore, the directions of the rotation axes C63 (C163) and C64 (C164) of the swing end side roller 63 (163) and the support shaft side roller 64 (164) are not limited to the substantially horizontal direction, and the transport roll 50 Can be changed according to the direction in which the rotation axis C50 is directed.
- the rotation axis C63 (C163) of the swing end side roller 63 (163) and the rotation axis C64 (C164) of the support shaft side roller 64 (164) are accompanied by the swinging motion of the swing arm 61 (161).
- the rotation axes C63 (C163) and C64 (C164) need only be arranged in a direction parallel to the rotation axis C50 of the conveyance roll 50, and more specifically, the rotation axis of the conveyance roll 50.
- the oscillating end side roller 63 (so that the rotation axes C63 (C163), C64 (C164) are perpendicular to the rotation center axis C65 (C165) of the support shaft 65 (165) which is perpendicular to C50. 163) and the spindle part side roller 64 (164) should just be arrange
- the swing end side roller 63 (163) and the support shaft side roller 64 (164) are smooth rolls whose outer peripheral surfaces are flat across the width direction (CD direction) of the roller.
- a roller with a crown may be used.
- This roller with a crown is a roller in which the maximum diameter portion of the roller is set at the center in the width direction.
- the elastic band member 121 (122) hung around the outer peripheral surface is given a centripetal force toward the central portion in the width direction of the roller by the maximum diameter portion of the outer peripheral surface, It becomes difficult to come off.
- crown-equipped rollers include, for example, a roller in which an annular rib is formed along the circumferential direction only at the central portion of the outer peripheral surface, and the radius gradually increases from the end portion of the outer peripheral surface to the central portion.
- a roller etc. are mentioned.
- the hot melt adhesive is applied to the elastic band members 121 and 122 by the adhesive application device, but the present invention is not limited to this as long as the sheet 103b and the elastic band members 121 and 122 can be joined.
- it may be applied to the sheet 103b, or may be applied to both the elastic band members 121 and 122 and the sheet 103b.
- 1 disposable diaper (absorbent article), 1a front waist area, 1b inseam area, 1c rear waist area, 2 surface sheet, 3 back sheet, 3a inner sheet, 3b outer sheet, 4 absorber, 10 leg notch 11, 11 edge flap, 12 side edge flap, 16 waist elastic member, 21 front elastic band member, 22 rear elastic band member, 30 manufacturing device, 40 slit device, 40a rotary blade, 40b rotary blade, 50 transport Roll, 60 1st guide member, 61 oscillating arm, 61a oscillating end, 61b extending part, 61h through hole, 63 oscillating end side roller, 64 spindle part side roller, 65 spindle part, 65h through hole ( Communication space), 66 outer cylinder member, 67 bearing, 70 drive mechanism, 72 motor (drive source), 72a drive rotating shaft, 74 crank Structure (conversion transmission mechanism), 75 disk member (rotating member), 76 link member (connection member), 78 connection pin, 79 endless belt, 81 pulley, 82 pulley, 92 support wall
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Abstract
Description
搬送方向に連続して搬送されるシートの連続体に対して、弾性部材の連続体を所定の蛇行パターンで接合して吸収性物品に係る複合シートを製造する方法であって、
前記搬送方向に沿う方向に回転する搬送ロールの外周面に前記シートの連続体を巻き付けて前記シートの連続体を搬送することと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動する揺動アームを介して、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合することと、を有し、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記接合することでは、前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造方法である。
搬送方向に連続して搬送されるシートの連続体に対して、弾性部材の連続体を所定の蛇行パターンで接合して吸収性物品に係る複合シートを製造する装置であって、
前記搬送方向に沿う方向に回転し、外周面に前記シートの連続体を巻き付けて搬送する搬送ロールと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動し、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合する揺動アームと、を備え、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造装置である。
前記搬送方向に沿う方向に回転する搬送ロールの外周面に前記シートの連続体を巻き付けて前記シートの連続体を搬送することと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動する揺動アームを介して、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合することと、を有し、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記接合することでは、前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造方法。
このような吸収性物品に係る複合シートの製造方法によれば、支軸部に対して揺動アームの駆動源の駆動回転軸を同芯に直結しなくとも揺動アームを揺動可能である。よって、支軸部近傍に駆動源を配置せずに済み、結果、弾性部材の連続体を、支軸部の回転中心軸方向に沿った供給ルートで支軸部に向けて供給し易くなる。
前記揺動アームにおける前記搬送ロールと対向する側の面に、前記揺動端側ローラーと前記支軸部側ローラーとは設けられており、
前記支軸部には、該支軸部の回転中心軸方向に沿って、前記搬送ロールに対向する側と前記搬送ロールに対向しない側とを連通するための連通空間が形成されており、
前記支軸部の回転中心軸方向に沿った前記供給ルートで送られる前記弾性部材の連続体は、前記揺動アームにおける前記搬送ロールに対向しない側の面に到達し、前記連通空間に通されることにより前記支軸部側ローラーに至るのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、揺動アームにおいて支軸部側ローラーが設けられた面の逆側の面(つまり、搬送ロールに対向しない側の面)に向けて、弾性部材の連続体が送られる場合でも、支軸部の前記連通空間を通して、弾性部材の連続体を支軸部側ローラーへ確実に掛け回し可能となる。
前記連通空間は、前記支軸部の回転中心軸方向に沿って該支軸部に形成された貫通孔であるのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、揺動アームにおいて支軸部側ローラーが設けられた面の逆側の面(つまり、搬送ロールに対向しない側の面)に向けて、弾性部材の連続体が送られる場合でも、支軸部の貫通孔を通して、弾性部材の連続体を支軸部側ローラーへ確実に掛け回し可能となる。
前記支軸部の回転中心軸は、前記支軸部側ローラーの外周面に接しているのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、支軸部の回転中心軸は、支軸部側ローラーの外周面に接している。よって、弾性部材の連続体は、支軸部の回転中心軸方向に沿って確実に支軸部側ローラーへ送られる。その結果、揺動アームの揺動動作により生じうる弾性部材の連続体の交差方向の移動は、支軸部側ローラーよりも上流側の弾性部材の部分の捻れとして確実に現れてこれに吸収されるようになり、結果、支軸部側ローラーから弾性部材の連続体が外れることは有効に防止される。
前記駆動力を前記揺動アームに入力すべく、駆動回転する駆動回転軸を有する駆動源と、前記駆動回転軸の回転動作を往復移動動作に変換して前記揺動アームの前記位置に伝達する変換伝達機構とが設けられており、
前記変換伝達機構は、前記駆動回転軸に一体に取り付けられた回転部材と、前記揺動アームの前記位置を、前記回転部材における前記駆動回転軸から偏心した位置に連結する連結部材とを有し、
前記回転部材には、前記偏心した位置が、互いの偏心量を異ならせて複数設定されているのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、回転部材における前記偏心した位置の選択によって、揺動アームの振幅量を変更することができる。よって、弾性部材の蛇行パターンに応じて前記偏心した位置を選択することにより、所望の蛇行パターンへと容易に変更可能となる。
前記搬送ロールは回転軸周りに回転し、
前記揺動アームの揺動端側ローラーと前記支軸部とは、これら両者で前記搬送ロールの前記回転軸を挟むように配置されており、
前記弾性部材の連続体は、前記揺動端側ローラーによって進行方向を反転させられて前記搬送ロールに供給されるのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、弾性部材の連続体の揺動端側ローラーへの巻き付き角度を大きく確保可能となる。これにより、揺動端側ローラーの外周面に弾性部材の連続体をしっかりと保持できて、その結果、揺動端側ローラーからの弾性部材の連続体の脱落を有効に防止し得る等、弾性部材の連続体の走行状態の安定化を図れる。
また、弾性部材の連続体が帯部材の連続体の場合には、当該帯部材の連続体を略平坦形状に維持しつつ前記シートへ送ることができて、結果、前記シートに対して帯部材の連続体を面接触させて接合可能となる。すなわち、上述の進行方向の反転により、帯部材の連続体は、揺動端側ローラーの外周面に大きな巻き付き角度で巻き付いている。よって、当該外周面により帯部材の連続体は略平坦形状に拘束され、その結果、前記シートに対して確実に面接触して接合されるようになる。
前記支軸部側ローラーは、該支軸部側ローラーの外周面が前記揺動アームの前記揺動端の方を向いた状態で前記揺動アームに対する向きを変更不能に前記揺動アームに支持されているのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、揺動端側ローラーの揺動動作に応じて支軸部側ローラーの外周面は、揺動端側ローラーの方を向く。よって、前記揺動動作によって揺動端側ローラーが前記交差方向に位置を変えても、揺動端側ローラーへ向けて弾性部材の連続体を確実に送ることができて、その結果、揺動端側ローラーからの弾性部材の連続体の脱落を有効に防止し得る等、弾性部材の連続体の走行状態の安定化を図れる。
また、揺動アームの揺動動作に完全に同期させて、支軸部側ローラーの外周面が常に前記揺動端を向くようにすることができる。
前記交差方向は前記搬送方向と垂直であり、
前記支軸部の回転中心軸方向は、前記搬送ロールを前記搬送方向に沿う方向に回転するための回転軸に垂直であり、
前記揺動端側ローラーの回転軸が前記支軸部の回転中心軸方向と垂直になるように、前記揺動端側ローラーは配置され、
前記支軸部側ローラーの回転軸が前記支軸部の回転中心軸方向と垂直になるように、前記支軸部側ローラーは配置されているのが望ましい。
このような吸収性物品に係る複合シートの製造方法によれば、搬送ロール、揺動端側ローラー、及び支軸部側ローラーの各回転軸の向きは、それぞれ、前記支軸部の回転中心軸方向に対して垂直関係にある。よって、弾性部材の連続体が揺動端側ローラーから搬送ロールに引き渡される際の弾性部材の連続体の捻れを抑制できて、弾性部材の連続体をシートの連続体に確実に面接触させることができる。
搬送方向に連続して搬送されるシートの連続体に対して、弾性部材の連続体を所定の蛇行パターンで接合して吸収性物品に係る複合シートを製造する装置であって、
前記搬送方向に沿う方向に回転し、外周面に前記シートの連続体を巻き付けて搬送する搬送ロールと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動し、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合する揺動アームと、を備え、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造装置。
このような吸収性物品に係る複合シートの製造装置によれば、支軸部に対して揺動アームの駆動源の駆動回転軸を同芯に直結しなくとも揺動アームを揺動可能である。よって、支軸部近傍に駆動源を配置せずに済み、結果、弾性部材の連続体を、支軸部の回転中心軸方向に沿った供給ルートで支軸部に向けて供給し易くなる。
また、揺動アームにおける支軸部側の部分には、支軸部側ローラーが設けられており、弾性部材の連続体は、前記支軸部の回転中心軸方向に沿って前記支軸部側ローラーへと送られる。よって、揺動アームの揺動動作により生じうる弾性部材の連続体の交差方向の移動は、主に支軸部側ローラーよりも上流側に位置する弾性部材の連続体の部分の捻れとして現れてこれに吸収され、これにより、支軸部側ローラーからの弾性部材の連続体の脱落は有効に防止される。その結果、弾性部材の連続体の走行状態の安定化が図られる。
本実施形態のシートの製造方法及び製造装置は、例えば、使い捨ておむつ1(吸収性物品に相当)の製造ラインに適用されている。
図3Aはおむつ1の部分破断平面図であり、図3Bは同分解斜視図である。両図とも、パンツ型のおむつ1の脇腹部において前胴周り域1aと後胴周り域1cとを分離した展開状態で示している。
このようなおむつ1は、製造ラインを連続して流れるおむつ1の基材に対して各種構成部品が接合等されて完成される。本実施形態に係る複合シートの製造方法及び製造装置30は、その一工程を担っている。すなわち、ここでは、上述の裏面シート3の外側シート3bとなるべきシート103bの連続体(以下では、シート103bと言う)に対して、上述の前方弾性帯部材21となるべき弾性帯部材121の連続体(弾性部材に連続体に相当し、以下では、弾性帯部材121と言う)と、上述の後方弾性帯部材22となるべき弾性帯部材122の連続体(弾性部材の連続体に相当し、以下では、弾性帯部材122と言う)とを上述の蛇行パターンで取り付ける工程に適用されている。
搬送ロール50は、回転軸C50が水平なCD方向を向いた円柱体を本体とし、MD方向に沿う方向を回転方向として所定の周速で反時計回りに回転する。この搬送ロール50には、例えば、右方から略水平にシート103bが供給され、当該シート103bは、搬送ロール50の上部の約0時の位置を巻き付き開始位置Psとして、そこから例えば180°~200°の巻き付き角度で搬送ロール50の外周面に巻き付けられて搬送方向を反転され、最終的に、搬送ロール50の下部の約6時の位置を巻き付き終了位置Peとして略水平方向の右方へ送り出される(「搬送すること」に相当)。
この搬送ロール50は、適宜なモーター等を駆動源として駆動回転する駆動ロールとして構成されても良いし、または、シート103bによって従動回転される従動ロールとして構成されても良い。
スリット装置40は、CD方向の中央に上下一対の円盤状の回転刃40a,40bを有している。そして、これら回転刃40a,40bを通過する際に、弾性帯部材121,122の原反たるシート状部材120は二分割されて、これにより一対の弾性帯部材121,122が生成される。そして、各弾性帯部材121,122は、それぞれ、第1案内部材60及び第2案内部材160へと送られる。
第1案内部材60は、搬送ロール50の左方に設けられた板状の揺動アーム61を有する。揺動アーム61は、搬送ロール50の回転軸C50を鉛直方向の上下に跨いで配置されている。そして、同回転軸C50よりも下方に位置する支軸部65を旋回支点として、同回転軸C50よりも上方に位置する揺動端61aをCD方向に揺動可能である。
第2案内部材160は、上述の第1案内部材60とほぼ同構造の部材である。そして、図5Bに示すように、CD方向に関して第1案内部材60よりも奥側に配置されており、これにより、この第2案内部材160が担当する弾性帯部材122は、第1案内部材60がシート103bに取り付ける弾性帯部材121よりもCD方向の奥側に並んで取り付けられる。但し、使い捨ておむつ1によっては、図4に示すように、弾性帯部材121と弾性帯部材122とを部分的に交差させるような配置パターンもあり得る。そして、その場合、第1案内部材60と第2案内部材160とを並列配置していると、これら案内部材60,160同士が衝突してしまい、上述のパターンを形成できない。
(a)揺動端側ローラー163と支軸部側ローラー164とは、各々、揺動アーム161の揺動端161aと支軸部165の回転中心軸C165とを結ぶ直線上に配置されている。
(b)揺動端側ローラー163は、その外周面が揺動アーム161の支軸部165の回転中心軸C165の方を向いた状態で揺動アーム161に対する向きを変更不能に揺動アーム161に固定されており、支軸部側ローラー164も、その外周面が揺動アーム161の揺動端161aの方を向いた状態で揺動アーム161に対する向きを変更不能に揺動アーム161に固定されている。
(c)支軸部側ローラー164への弾性帯部材122の供給ルートR122は、支軸部165の回転中心軸C165と一直線に揃えられているとともに、支軸部側ローラー164の外周面が支軸部165の回転中心軸C165に接するように支軸部側ローラー164は配置されている。
以上、本発明の実施形態について説明したが、本発明は、かかる実施形態に限定されるものではなく、以下に示すような変形が可能である。
Claims (9)
- 搬送方向に連続して搬送されるシートの連続体に対して、弾性部材の連続体を所定の蛇行パターンで接合して吸収性物品に係る複合シートを製造する方法であって、
前記搬送方向に沿う方向に回転する搬送ロールの外周面に前記シートの連続体を巻き付けて前記シートの連続体を搬送することと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動する揺動アームを介して、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合することと、を有し、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記接合することでは、前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1に記載の吸収性物品に係る複合シートの製造方法であって、
前記揺動アームにおける前記搬送ロールと対向する側の面に、前記揺動端側ローラーと前記支軸部側ローラーとは設けられており、
前記支軸部には、該支軸部の回転中心軸方向に沿って、前記搬送ロールに対向する側と前記搬送ロールに対向しない側とを連通するための連通空間が形成されており、
前記支軸部の回転中心軸方向に沿った前記供給ルートで送られる前記弾性部材の連続体は、前記揺動アームにおける前記搬送ロールに対向しない側の面に到達し、前記連通空間に通されることにより前記支軸部側ローラーに至ることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項2に記載の吸収性物品に係る複合シートの製造方法であって、
前記連通空間は、前記支軸部の回転中心軸方向に沿って該支軸部に形成された貫通孔であることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1乃至3の何れかに記載の吸収性物品に係る複合シートの製造方法であって、
前記支軸部の回転中心軸は、前記支軸部側ローラーの外周面に接していることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1乃至4の何れかに記載の吸収性物品に係る複合シートの製造方法であって、
前記駆動力を前記揺動アームに入力すべく、駆動回転する駆動回転軸を有する駆動源と、前記駆動回転軸の回転動作を往復移動動作に変換して前記揺動アームの前記位置に伝達する変換伝達機構とが設けられており、
前記変換伝達機構は、前記駆動回転軸に一体に取り付けられた回転部材と、前記揺動アームの前記位置を、前記回転部材における前記駆動回転軸から偏心した位置に連結する連結部材とを有し、
前記回転部材には、前記偏心した位置が、互いの偏心量を異ならせて複数設定されていることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1乃至5の何れかに記載の吸収性物品に係る複合シートの製造方法であって、
前記搬送ロールは回転軸周りに回転し、
前記揺動アームの揺動端側ローラーと前記支軸部とは、これら両者で前記搬送ロールの前記回転軸を挟むように配置されており、
前記弾性部材の連続体は、前記揺動端側ローラーによって進行方向を反転させられて前記搬送ロールに供給されることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1乃至6の何れかに記載の吸収性物品に係る複合シートの製造方法であって、
前記支軸部側ローラーは、該支軸部側ローラーの外周面が前記揺動アームの前記揺動端の方を向いた状態で前記揺動アームに対する向きを変更不能に前記揺動アームに支持されていることを特徴とする吸収性物品に係る複合シートの製造方法。 - 請求項1乃至7の何れかに記載の吸収性物品に係る複合シートの製造方法であって、
前記交差方向は前記搬送方向と垂直であり、
前記支軸部の回転中心軸方向は、前記搬送ロールを前記搬送方向に沿う方向に回転するための回転軸に垂直であり、
前記揺動端側ローラーの回転軸が前記支軸部の回転中心軸方向と垂直になるように、前記揺動端側ローラーは配置され、
前記支軸部側ローラーの回転軸が前記支軸部の回転中心軸方向と垂直になるように、前記支軸部側ローラーは配置されていることを特徴とする吸収性物品に係る複合シートの製造方法。 - 搬送方向に連続して搬送されるシートの連続体に対して、弾性部材の連続体を所定の蛇行パターンで接合して吸収性物品に係る複合シートを製造する装置であって、
前記搬送方向に沿う方向に回転し、外周面に前記シートの連続体を巻き付けて搬送する搬送ロールと、
支軸部を旋回支点として前記搬送方向と交差する交差方向に揺動し、前記弾性部材の連続体を前記搬送ロールに巻き付いている前記シートの連続体の部分に送って接合する揺動アームと、を備え、
前記揺動アームは、該揺動アームの揺動端側に設けられた揺動端側ローラーと、前記支軸部側に設けられた支軸部側ローラーと、を有し、
前記支軸部の回転中心軸方向に沿った供給ルートで前記支軸部側ローラーに向けて供給された前記弾性部材の連続体が、順次、前記支軸部側ローラーの外周面及び前記揺動端側ローラーの外周面に掛け回されて前記シートの連続体へと誘導され、
前記揺動アームの前記支軸部とは異なる位置に、前記揺動アームを揺動させるための駆動力が入力されることを特徴とする吸収性物品に係る複合シートの製造装置。
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JP5799191B1 (ja) * | 2014-12-15 | 2015-10-21 | ユニ・チャーム株式会社 | 複合シートの製造装置、及び、複合シートの製造方法 |
CN108882996B (zh) * | 2016-04-05 | 2021-05-25 | 尤妮佳股份有限公司 | 吸收性物品制造方法 |
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- 2010-03-29 UA UAA201112623A patent/UA113381C2/uk unknown
- 2010-03-29 KR KR1020117025296A patent/KR101687846B1/ko active IP Right Grant
- 2010-03-29 EP EP10758627.3A patent/EP2415434B1/en active Active
- 2010-03-29 CN CN201080014906.9A patent/CN102365070B/zh active Active
- 2010-03-29 US US13/262,659 patent/US9107774B2/en active Active
- 2010-03-29 WO PCT/JP2010/055541 patent/WO2010113856A1/ja active Application Filing
- 2010-03-29 EA EA201101447A patent/EA020516B1/ru not_active IP Right Cessation
- 2010-03-29 BR BRPI1006784-1A patent/BRPI1006784A2/ja not_active Application Discontinuation
- 2010-03-31 AR ARP100101082A patent/AR076032A1/es unknown
- 2010-04-02 TW TW099110356A patent/TW201106927A/zh unknown
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Also Published As
Publication number | Publication date |
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JP2010240113A (ja) | 2010-10-28 |
TW201106927A (en) | 2011-03-01 |
US20120077660A1 (en) | 2012-03-29 |
CN102365070A (zh) | 2012-02-29 |
JP5277051B2 (ja) | 2013-08-28 |
EA020516B1 (ru) | 2014-11-28 |
UA113381C2 (xx) | 2017-01-25 |
BRPI1006784A2 (ja) | 2018-03-06 |
EA201101447A1 (ru) | 2012-05-30 |
EP2415434A4 (en) | 2014-06-18 |
CN102365070B (zh) | 2014-08-20 |
US9107774B2 (en) | 2015-08-18 |
EP2415434B1 (en) | 2015-09-02 |
KR101687846B1 (ko) | 2016-12-19 |
AR076032A1 (es) | 2011-05-11 |
KR20110134925A (ko) | 2011-12-15 |
EP2415434A1 (en) | 2012-02-08 |
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